Tellurian.



L. H. VAN SYGKLE.

Y TELLURIAN. APPLICIATION rum) mun. 2a, 1008.

Patented Feb. 23, I909.

B BHBETB-BHEET 1.

Nwrunv INVENTOR .Lwnwlas .H. Van/S 0152a ATTORNEY WITNESSES M 6 rut"cams .PEYIRS w, uusmnm'mv. n. c.

L. H. VAN SYGKLE.

I TELLURIAN. APPLIUATIOH FILED MAR. 28, 180B.

Patentad Feb. 23, 1909.

2 BHBBTB-BEBBT 2.

IN l/E N TOR Learn/dang H. 15:12 yalclq A TTURNE Y Ens cm, umsmmzrorv,n. c

LEONIDAS H. VAN SYGKLE, OF FORT LEE, NEW JERSEY.

TE LLURIAN.

Specification of Letters Patent.

Patented Feb. 23, 1909.

Application flied March 26, 1908. Serial No. 423,344.

To all whom it may concern:

Be it known that I, LEONIDAS H. VAN

SYoKLE, a citizen of the United States, and a resident of Fort Lee, inthe county of Bergen and State of New Jersey, have invented certain newand useful Im rovements in Tellu rians, of which the fol owing is aspecification.

The invention relates to a tellurian used to instruct children in thevarious natural phenomena of the solar system, such as the approximatemovement of the earth as rotating on its own axis it revolves around thesun, thus causing day and night and the seasons; in the relativeposition of the planets to the earth and sun; and to illustrate thefixed inclina tion of the axis of the earth to the lane of the earthsorbit, the fixed general direction in which the axis points, and itsrelative positions to the sun during the earths revolution.

The invention consists of a combination of mechanical contrivanceswhich, when operated in unison, will impart simultaneously to a sphererepresentmg the earth and mounted upon an inclined axis, a rotatingmovement around its own axis and a revolving movement around apredetermined fixed point representing the sun.

The invention further consists of mechanical means for keeping the outeredge of the inclined pulley at a constant distance from the axis of thenon-rotatable driving pulley, thus maintaining an even tension in thedriving flexible connection. All of which will-be fully described andpointed out in the claims.

In the drawings Figure 1 is a side elevation of the inventionrepresenting in its entirety a tellurian. Fig. 2 is a lan of Fig. 1.Fig. 3 is also a side elevation oi the tellurian in which is shown themanner of illustrating the relative ositions of the celestial bodiesforming the ipper to the earth in its various stages of rotation andrevolution; it likewise illustrates the positions of other planets aswell. Fig. 4 is a cross section of the rotatable base showing the mannerin which the angular arm is mounted upon it. Fig. 5 is a detached planof the rotatable base or disk in which is shown the groove adapted toreceive the angular arm from which extends the inclined axis. Fig. 6 isa diagram of the main mechanical feature of my invention. Here is shownthe center of the inclined pulley lying on the prolongation of the axisof the rotatable base, thus maintaining at all times a fixed distancebetween the axis of the nonrotatable pulley and the outer and drivenedge of the inclined pulley, and maintaining a constant and equa tensionupon the driving flexible connection and producing a smooth and evenrotation of the sphere representing the earth.

Similar letters refer to similar parts throughout the drawings in whichthe base a. may be made in any shape and of any material desired, and isprovided with a vertically rojecting stud b. centrally located thereon.pon the stud b.is loosely mounted a radial swinging arm 0. havingmounted concentrically with its axis a non-rotatable circular disk d.;the longer extension of the said radial swinging arm a. is provided,near its outer extremity, with the rotatable base or disk e. driven fromthe fixed circular disk (1. by means of a flexible connection. The diskd. and the base e. are e ual in diameter so that the base 6. Will msiireone complete revolution for each complete revolution of the swinging arm0., thus the successive positions assumed b the inclined axis of theglobe representing the earth will be arallel.

he rotatable base or disk 6. is provi ed with the centrally locatedvertical perforation f. the latter terminating into an angular groove 9.and adapted to receive the corres 0ndingly shaped extension of theincline axis 7. representing the axis of the earth, thus preventing thelatter from rotating in the ase e. and causing the motion of the axis h.to coincide with that of the base. There is mounted upon the inclinedaxis h. and above the rotatable base or disk e. the spherical body i.the latter adapted to engage with the corres ondingly shaped concavitylo cated on t e base of the pulley k. which is rigidly secured to the shere 8. the whole of which is mounted loose y upon the inclined axis h.The said pulle k. is connected with the non-rotatable pu ley Z. mountedconcentrically with the axis of the arm a. by means of the crossedflexible connection m. The distance between the non-rotatable pulley l.and the pulley k. is ke t constant b6? reason of the center of the pu eyk. coinci ing with the prolongation of the axis of the rotatable base 6.thus maintaining at all times the same distance between the driving edes of the non-rotatable pulley and the inc ined pulley and keeping thetension of the flexible connection constant. The shorter or rearwardportion 0 of the radial swinging arm 0. is hole n. which is used byinsert his pencil or wand operating the device.

It will be obvious that the wire 0. representing the dip er and polarstar is rigidly secured to t e upper extension of the inclined axis h.and revolveswith it, as shown in Fig. 3. The wire p. shown in thedrawing,

the instructor to when desirous of provided with a loop or taneouslymovements to the sphere s. and

the inclined axis it. thus illustrating the rotating and revolvingmovements of the earth around the sun, and the different positions ofthe inclined axis with regard to the sun, and at the same timemaintaining the arallelism of the axis at all stages of revo ution. Itwill also illustrate the exact location of any antipodes the instructormay Fig. 3, supporting the sphere representing wish to point out.

the moon, is wound around the inchned axis h. loosely but its free endis secured to the sphere s. thus moving. with it; but the c nstructionshown is not intended to show the degree of movement of the moon but toshow its relative position to the earth. The upper surface of the basea. is divided into four equal parts representing the four seasons of theyear. The longer portion of the radial swinging arm 0. lies directlyover the section or division marked winter which indicates the startingpoint from which the radial swingin arm travels in the directionindicated by t e arrow towards the spring and so on until winter isagain reached when the earth shall have made one com.- plete revolutionaround the sun.

Mode of operation: When the instructor desires to instruct his pu ils inthe relative position, of the earth to tile sun, its manner of rotatingabout its own axis while revolving around the sun; the relative.position of the inclined axis of the earth to the sun at of the tpulleythe location of l axis 0" different seasons of the year, t e differentantipodes, and various other natural phenomena of the solar system, hewill first place his pencil or wand in the loop a. and move the radialswinging arm 0, in the direction indicated by the arrow, thus by meansof the flexible connections t and m. respectively imparting a rotarymovement a s tata e r d k wi th ulley 7c. the former carr ing theinclinedaxis its attachment wh le the latter carries the sphere reresenting the earth anditsattach; merits. ft will be obvious that allmoving parts working in unison will impart simul l l l l J and a globerepresenting Having thus described my invention what I claim as new anddesire to secure by Letters Patent, is

1. In a tellurian, the combination, consisting of a rotatable base, aninclined axis mounted thereon, a pulley mounted u on the aforesaid axisthe center of the pu ley lying in the prolongation of the axis of therotatable base, and a globe fixedly con nected to the pulley and mountedupon the inclined axis.

2. In a tellurian, the combination, consisting of a fixed base, aswinging arm mounted upon the fixed base, two nonrotatable pulleys anda. ball representing the sun mounted upon the. axis of the arm, arotatable. base journaled upon one end of the aforesaid arm, a flexibleconnection driving the. rotatable base from the lower of two non-rotatabe pulleys, an inclined axis mounted upon the rotatable base, a pulleymounted upon the inclined axis the center lying in the prolongation ofthe the rotatable base, a crossed flexible connection driving theinclined ulley from the upper of the two non-rotata le. pulle *s,

the earth fixedly connected to the inclined pulley and mounted upon theinclined axis.

Signe a Manhatt n ough, ew Y rk cit in the county of New York and Stateof ew York this 21 st day of March. A. D. 1908.

